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How to find and move boot sectors?

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Operating Systems Linux Debian How to find and move boot sectors?
# 1  
Old 01-15-2013
How to find and move boot sectors?
Hi
A mismatch occurred on my system (Debian, Sid). I've got 3 disks sda, b, c.
Unfortunately, when I was adding a third disk (sdc) it all finished so that both sdb and sdc now have a boot flag. So, the first thing I would like to find out is which disk the system now boots from: sdb or sdc? In which log and how can I find that? The next thing is: If sdb, where is the boot sector? (I would like to erase all files from sdb). Is it in the master boot sector (outside of the partions of the disk) or in the volume boot sector (inside the first partition of the disk)? In which log can I find that and how? If it is in the volume boot sector I must not reformat the disk. The third question is: How can I move the boot sectors? I would like to move the boot sector to sda and remove boot labels from sdb and sdc. But sdc also hosts Windoze 7? Is that a problem. So, I should change grub, fstab, and what else? And how?
Thanks,
Mladen.
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LEARN ABOUT DEBIAN

lilo-uuid-diskid

LILO-UUID-DISKID(8)						lilo documentation					       LILO-UUID-DISKID(8)

NAME

       lilo-uuid-diskid - convert boot / root options to diskid and uuid in lilo.conf.

SYNOPSIS

       lilo-uuid-diskid [-h] [-v] [lilo.conf]

DESCRIPTION

       This script looks for the boot block device or boot partition and create the right diskid or uuid as boot option. Then it looks for all
       root partitions and create the right uuids as root options.

       These conversions are necessary for use with newer kernel (>= 2.6.26) if it use the libata module for parallel and serial ATA interfaces of
       block devices (i. e. hard disks with IDE or SATA interface, usbsticks).

OPTIONS

       -h  Print a brief help.

       -v  Print verbose messages.

EXAMPLES

       Lines in the configuration file /etc/lilo.conf:

	 #boot = /dev/sda
	 boot = /dev/disk/by-id/ata-SAMSUNG_SV1604N_S01FJ10X999999

	 #root = /dev/sda1
	 root = "UUID=/dev/disk/by-uuid/18843936-00f9-4df0-a373-000d05a5dd44"

COPYRIGHT and LICENSE
       Copyright (C) 2010-2011 Joachim Wiedorn

       This script is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       On Debian systems, the complete text of the GNU General Public License version 2 can be found in `/usr/share/common-licenses/GPL-2'.

AUTHOR

       lilo-uuid-diskid was written by Joachim Wiedorn.

       This manual page was written by Joachim Wiedorn <ad_debian at joonet.de> for the Debian project (and may be used by others).

SEE ALSO

       lilo(8), update-lilo(8), liloconfig(8)

23.1								    2011-03-20						       LILO-UUID-DISKID(8)